9 resultados para invasión

em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"


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It is known that the invasin molecule of Yersinia pseudotuberculosis stimulates human peripheral B cells in vitro. In this work we evaluated the in vivo role of invasin as polyclonal activator of B lymphocytes in the mouse experimental model, by comparing strains of Y. pseudotuberculosis expressing invasin and isogenic inv mutants. Swiss mice were infected intravenously with two strains expressing invasin (YpIII pIB1 and an isogenic virulence plasmid-cured strain, YpIII) and with two invasin mutant strains (Yp100 pIB1 and Yp100, plasmid-cured). Spleen cells were sampled on days 7, 14, 21 and 28 after infection. Immunoglobulin (Ig)-secreting spleen cells were detected by protein A plaque assay and specific antibodies were detected in sera by ELISA. The virulent strain YPIII pIB1 (wild type) did not provoke polyclonal activation of B lymphocytes in vivo. In general, fewer Ig-secreting spleen cells of all isotypes were found in the infected animals than in the control animals. Specific IgG antibodies were detected in the sera of animals infected with all strains. The peak response occurred on the 21 st day post-infection, and the Yp100 strain provoked the highest level of these antibodies. We concluded that invasin is not a polyclonal activator of murine B cells.

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OBJETIVO: Determinar através de cortes tomográficos e reconstrução tridimensional a incidência de mal posicionamento de parafusos em pacientes submetidos ao tratamento cirúrgico da Escoliose idiopática do adolescente. MÉTODOS: Foram analisados exames tomográficos de 8 pacientes, tratados cirurgicamente no Hospital de Base de São José do Rio Preto-SP, realizada instrumentação posterior partindo de T2 /T4 a L4/L5 totalizando 164 parafusos. RESULTADOS: 32,9% (n=54) apresentavam posicionamento com risco potencial,ou seja desvio acima de 2 milímetros, sendo 20,1% (n=33) com invasão lateral, 9,1% (n=15) com invasão medial, 3,6 %(n=6) com invasão anterior. Dos parafusos que ofereciam risco potencial a relação com aspecto da curva foi de 46% (n=25) na concavidade, 35% (n=19) na convexidade e 19% (n=10) em vértebras adjacentes a curva. CONCLUSÃO: Os limites de penetração aceitáveis, assim como os métodos de mensuração ainda não foram padronizados, a técnica free hand' mostrou-se segura, apesar da violação dos pedículos. A tomografia computadorizada pré-operatória, auxilia no planejamento cirúrgico e na redução das complicações.

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Esta pesquisa teve por objetivo identificar, explicitar e analisar as concepções de desenvolvimento/aprendizagem presentes no trabalho de profissionais de uma escola pública, visando à construção de conhecimentos que permitissem transformar a prática educativa. Elaboraram-se roteiros de entrevista para os professores, o coordenador pedagógico e a direção, um roteiro de observação de aulas e um para consulta ao projeto pedagógico. Os dados foram organizados em categorias que relacionam as concepções de desenvolvimento/aprendizagem apresentadas pela Teoria Histórico-Cultural àquelas encontradas nos dados obtidos na escola. Verificou-se que o trabalho desses profissionais não é fundamentado em uma única concepção de desenvolvimento/aprendizagem, o que pôde ser demonstrado pela coexistência de várias teorias, entre as quais se destacam a de Piaget e a de Vigotski. Constatou-se que as abordagens dos profissionais da escola são permeadas pela cotidianidade, discutindo-se, a partir da Teoria do Cotidiano, de Heller, a invasão de um espaço de produção do conhecimento por ações/reflexões cotidianas.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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This study aimed to analyze the teachers´ knowledge of a physical education teacher network state of São Paulo. The interviewed reported having problems regarding the use of the court, especially because there is invasion of the community to smoking marijuana and/ou playing football, revealing the predominance of experiential knowledge to work in a new school, whose location and local culture do not seem to prioritize this social space as learning, dissemination and preservation of other bodily manifestations of the process of human civilization. It was found in such a setting an imbalance of the relative strengths of power between teacher and students, from schools, football and drugs in relation to body movement culture, it being understood that the relationships between these individuals are interdependent and dynamic. Finally, it urges an integrated process in educational, family, social and political fields from the perspective of balancing forces in relation to the use of that space, providing conditions for teaching and propagation of content (games, sports, gymnastics, dances and fights) of the body movement culture.

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The aim of this study was to detect the expression of ciclooxigenase-2 (COX-2) in metastatic primary carcinoma and non metastatic carcinoma, taking into consideration the relation between COX-2 and the progression of cancer. Evaluation of the COX-2 expression was achieved by immunohistochemistry analysis, using the primary polyclonal antibody anti-PGHS-2, clone PG 27, (Oxford Biomedical Research). The number of marked cells by the COX-2 antibody was higher (P < 0.001) in the metastatic primary carcinoma (81.25%) than non-metastatic (60.3%). There was a positive correlation between the number of labeled cells.

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Computed tomography (CT) can be considered an important test to identify the presence of primary brain neoplasias in dogs. CT results can help define the type of brain tumor when associated with clinical findings. It allows the identification of lesions and their features, such as size, location, compression and invasion of adjacent tissue. One must analyze the density, mass effect, peritumoral edema, calcification, and image enhancement after intravenous injection of contrast medium. Gliomas, meningiomas and tumors of the choroid plexus and pituitary are the most common primary brain neoplasms diagnosed by CT in dogs. The aim of this paper is to review the literature related to primary brain tumors and report their most important tomographic features, in order to help clinicians achieve a presumptive diagnosis of tumor type.